<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <script src="http://at.alicdn.com/t/font_3141975_wh53rys06gg.js"></script>
  <style type="text/css">
    /* .icon {
      width: 1em;
      height: 1em;
      vertical-align: -0.15em;
      fill: currentColor;
      overflow: hidden;
    } */

    /* css变量的使用 */
    .box {
      --bgc: orange;
      background-color: var(--bgc);
    }

    .content {
      --bgc: aqua;
      background-color: var(--bgc);
    }
  </style>
  <body>
    <div class="box">
      <div class="title">123</div>
      <div class="content">456</div>
    </div>

    <!-- <svg class="icon" aria-hidden="true">
      <use xlink:href="#icon-aichong01"></use>
    </svg>
    <svg class="icon" aria-hidden="true">
      <use xlink:href="#icon-aichong02"></use>
    </svg>
    <svg class="icon" aria-hidden="true">
      <use xlink:href="#icon-aichong03"></use>
    </svg>
    <svg class="icon" aria-hidden="true">
      <use xlink:href="#icon-aichong04"></use>
    </svg>
    <svg>
      <use xlink:href="#icon-aichong05"></use>
    </svg> -->
  </body>
</html>
